Lick, eat, sleep, repeat: Cats spend around a quarter of their waking hours grooming themselves. A new study shows how hundreds of sharp tongue spines help domestic cats — and their big cat cousins — smear saliva deep into their own fur, to remove dirt and keep cool.

One upside of the regularity of high school life is that it can make finding friends easier. That's over now. It's going to take courage and be awkward but here are some ways to find new mates and maintain a good support network outside the schoolyard.